Dredger-derrick



(No Model.) 3 Sheets-Sheet 1.

0,11. SAGE. DREDGER DERRIGK.

N0. 425,257.A PatentedApr. 8, 1890, l

'ma News wetens co., Hom-umol, wnsmmro, n. c.

(No Model.) 3 sheets-sheet 2.

` C. H. SAGE.

DRBDGBR DBRRIGK.

Pate ted Apr. 8, 1890.

` @Hof/Meer (No Modem, 3 sheets-sheen 3. C. H. SAGE. DREDGER DERRIOK.

No. 425,257. Patented Apr. 8, 1890.

CLINTON Il. SAGE,

'or KENTON, OHIO.

DREDGER-DERRICK.

SPECIFICATION forming part of Letters Patent No. 425,257, dated April 8, 1890.

Application iiled May 23, 1888. Serial No.274.799. (No model.)

To @ZZ whom it may concern:

Be it known that I, CLINTON II. SAGE, of Kenton, in the county of I-Iardin and State of Ollio, have invented certain new and useful Improvements in Dredger-Derricks; and I do hereby declare the following to be a full, clear, and ex act description of the invention, such as will enable others skilledl in the art to which it appertains to make and use the same.

My invention relates to an improvement in dredger-derricks.

Dredging machinery has been placed on a floating ponton, scow, or boat and employed to excavate the channel of a stream by anchoring the floating hull at a desired point, so as to permit a crane or swinging boom to be swung around the bow of the vessel or ponton on which it pivots, so as to be brought into edective action upon the breast of the earth, mud, or silt they are intended to scoop up.

The object of my present invention is to provide a means whereby the crane, derrick, or swinging boom of a iioating dredger will be rotatively supported at such a suitable distance from the bow of a dredger-hull that sufficient buoyancy will be afforded to the forward portion of thehull by increased area of its surface-contact with the water in which it iloats.

A further object is to produce an improved turn-table and means for supporting a cranepost or swinging boom thereon at a suitable distance rcarwardlyfrom the cxtreme bow of a dredgerhull. A

lVith these obj eots in view my invention consists in certain features of construction and combinations of parts, that will be hereinafter described, and pointed out in the claims.

In the accompanying drawings, making a part of this specication, Figure l is a side elevation of the device in position on a ponton or floating hull, the latter-named being shown in section to expose turn-table mechanism. Fig. 2 is a plan view of the ponton or boat with a turntable and other parts shown. Fig. 3 is a view in elevation of the frame J2, and Fig. 4 is a plan View of the upper bearing-plate of the turn-table.

A represents the hull of a vessel or floating chamber, preferably made of wood, stoutly framed and planked water-tight. The two ends of the hull A, I prefer to make square,

as shown in Fig. l, the four sides being vertical, so as to provide the greatest possible area of surface to the bottom and attain increased buoyancy thereby. A stout framework A is built on the bottom timbers of the vessel, said frame-work serving as a support for a lower plate o.. This plate is provided with suitable downardly-projecting flanges by which it is secured to the frame-work A', and an upwardlycxtendin g annulariian ge a4, having an enlargement a5 at its top.

The turn-table Iis composed of timbers and planking properly braced and pinned together to render it a stable structure, and upon its lower side is secured the two curved pivot-plates a o', which together form a bearing-plate having an inwardly-proj ectin g bead u? formed on it, adapted to register with a mating groove a3, produced by the enlargement of the flange a4 of plate c, so that a light and strong pivotal center is afforded for the turn-table I, that will prevent lateral as well as vertical displacement of the turn-table I and yet allow it to freely revolve. Upon the timbers l), suitably fixed to the top of the tu r11-table I, two parallel beams E E are fastened, which extend outwardly beyond the bow of the boat- A, which together form what I designate a jib Strictly speaking, the jib-timbers E E are composed each of two pieces E E', held together by bolts or other means, and spaced apart by the cross-pieces b', as shown in Fig. 1.

The jib-tiinbers E are depressed, so that they form together an obtuse angle on their top faces, the timbers at the apex of the same resting upon` and being firmly attached to the top of the turn-table I. Spanning the inverted arches thus produced are the horizontal timbers E2, firmly bolted or otherwise secured.

The jib-frame from its form of construction, as shown in Fig. 1, projects rearwardly a proper distance, and below it outside of the turn-table I a wall of ti mbcr B is located upon the bottom of the boat, or, rather, upon the frame-timbers A". This wall is of such a height that a proper space is afforded between its top surface and the lower side of the jib E to allow several rollers or wheels .I to be journaled in brackets J, secured upon this lower surface of the j ib, which 4.rollers engage the top of the Wall B, and in this way give arolling support to the jib E as well as the timbers I.

The forward end of the jib E is preferably furnished with a separable box G to permit the transverse journal G', which is afxed to the lower end of the boom F, to be placed therein, and thus afford a suitable pivot-joint for the boom which will allow it to vibrate vertically.

The-frame J2, which is A-shaped,is secured at its feet J3 to the sides of the boat or to beams or standards secured to the sides or bottom thereof. The beams comprising this frame are spread apart sufficiently at the feet or base to permit the turn-table carrying the derrick to revolve without contact therewith, and are joined together at their upper ends and con nec'ted to the top of the derrick by the straps or collars c, which latter permit a free revolution of the derrick and turn-table, and at the same time afford the necessary support for Same.

The frame J 2 inclines forwardly, so that its top end is about in a vertical line with the center of the turn-table I, and is supported in this position by guy rods or chains M, which extend to the rear of the boat, and a forwardly-extended diagonal stay-bar II is secured by its ends to the front end of the jib E and the top of the upright section j 4 of the derrick, so as to connect the derrick to the jib forwardly, and thus distribute the load strain on the boom to the afterpart of the hull.

It should be understood that an engine and steam-boiler are supplied to move the bucket of the dredger. These details are of wellknown approved forms and are omitted as not being a part of this invention, as are also the chains and pulleys employed to connect the several parts of the device to the source of power, whereby proper movement of the working partsis obtained. l

Upon each side of the hull A, preferably at points opposite the center of the turn-table I,

or at any point opposite the edge of the turntable rearward of the bow, two spuds C are located. (See Fig. 2.) These consist of pieces of strong material, preferably Wood, of i a proper length and thickness for the purpose, so as to permit them to engage the bottom of a stream in which the dredgcr operates and be held in place on the side of the hull.

From the foregoing it will be apparent that the turn-table of a dredger may be located boom to be operated at right angles to the breast or bank of dirt that is being removed.

Many slight changes might be made to facilitate the construction of the device herein described and not exceed the spirit and legitimate scope of my invention. Hence I vdo not wish to limit myself to the exact forms shown;

but

IIaving fully described my invention, what I claim as new, and desire to secure by Letters Patent, is-

l. The combination, with a Vessel and turntable, the center of which is supported behind the bow-timbers of the vessel, of spuds located on opposite sides thereof at a distance behind the bow-timbers of said vessel and approximately in a line with the center of the turn-table and transversely of the vessel, substantially as set forth. 2. The combination, with a vessel, a turntable the center of which lis supported behind the bow-timbers. of the vessel, and timbers attached to theupper surface of the turn-table and lying nearly horizontal with the surface thereof, of spuds located on'opposite sides of the turntable at a distance behind the bowtimbers of the vessel and approximately in a line with the center of the turn-table and transversely with the vessel, substantially as set forth.

In a derrick, the combinatiomwith a vessel, a turn-table seated on the bottom timbers thereof at a point behind the bow-timbers and carrying a derrick, and braces attached tothe vessel and to the upper end of the derrick,of

spuds located on opposite sides of and approximately in a line with the center` of the turn-table and transversely of the vessel, sub-A stantially as set forth. i

In testimony whereof I have signed this specification in the presence of two subscribing Witnesses.

CLINTON H. SAGE.

lOO 

